Round number to only first decimal place

Question

I would like to know the available phone memory, so I wrote this code.

File path2 = Environment.getDataDirectory();
StatFs stat2 = new StatFs(path.getPath());
lo         


        

Answer 1

If you need the value for display purpose, use NumberFormat (see answer by Adam Arnold).

For numeric rounding (producing the rounded number), use BigDecimal:

double num = 3.141592653589793d;
double rounded = BigDecimal.valueOf(num).setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();